#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>

int main()
{
    char ch;

    while ((ch = getchar()) != EOF) {
        if (ch == '\n') {
            continue;
        }
        if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z')) {
            printf("%c is an alphabet.\n",ch);
        }
        else {
            printf("%c is not an alphabet.\n",ch);
        }

    }
    return 0;
}